18 Questions
What is the role of Th2 lymphocytes in immune response to helminthic infections?
Enhancing the proliferation and differentiation of B-lymphocytes into plasma cells
What is the characteristic immune response observed in most helminthic infections?
Eosinophilia and elevated serum IgE
How do IgE antibodies contribute to the expulsion of adult intestinal helminths?
By binding to mucosal mast cells, eosinophils, and goblet cells
Which mechanism of parasite evasion involves reducing the immune function of macrophages?
Immune suppression
What is the consequence of Trypanosoma gambiense infection on the immune system?
Impaired B and T lymphocyte activities
What is the characteristic immune response observed in filarial infections, such as Wuchereria bancrofti and Brugia malayi?
Polyclonal hypergammaglobulinemia with non-specific antibodies
What type of diet is not suitable for the development of intestinal protozoans?
High-protein
What is the role of pH in non-specific defenses against parasites?
pH kills parasites
Which of the following is an example of a specific immune response?
Triggered by antigens
What is the effect of the Duffy blood factor on Plasmodium vivax infections?
Increases susceptibility
What is the role of the immune response in parasitic infections?
Provides both non-specific and specific defenses
What is the effect of sickle-cell trait on falciparum malaria?
Confers some protection
How do antigens from parasites typically originate?
From the surface, secretions, excretions, and somatic tissues of the parasite
What is the primary function of macrophages in the immune response to parasites?
To serve as the first line cellular defense against invading pathogens through phagocytosis
What type of cells are increased in cases of parasitic invasion?
Eosinophils and neutrophils
What is the role of the skin in the immune response to parasites?
To have cellular components that participate in the immune response
What type of immune response begins when parasitic antigens are processed and presented to T-helper lymphocytes?
Specific immune response
What is the function of T-helper lymphocytes in the immune response to parasites?
To initiate a specific immune response
Learn about the immune responses to helminthic infections, including the role of Th2 lymphocytes, eosinophilia, and IgE antibodies. Understand how parasites evade the immune system and the mechanisms involved.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
